PL/SQL如何将Select多列存入一张表

Question

I am trying to create a function with PL/SQL that return information about an employee, by getting the user input (code_Employe) and pass into this function. So the function get this code or ID and search for the employee with this ID.

My problem is how that I don't know how to insert all the employee information in the return variable. Do I have to create a temporary table?

Here is my code:

CREATE OR REPLACE FUNCTION fNombreProjets(code_Emp IN Employe.idEmploye%type) 
    RETURN varchar2
is
   info_Emp varchar2(200); 
BEGIN

    SELECT  e.IDEMPLOYE ,
            e.NOMEMPLOYE ,
            e.ADRESSE ,
            e.TELEPHONE ,
            e.ADRESSECOURRIEL
    INTO info_Emp
    FROM Employe e
    WHERE idEmploye= code_Emp;

    RETURN info_Emp;
EXCEPTION
       when no_data_found then
       return 'Aucun employe';
END;    
/

ACCEPT val NUMBER PROMPT 'Entrer le code Employé: '
DECLARE
    code_Emp   NUMBER;
BEGIN
    code_Emp := '&val';
    select fNombreProjets(code_Emp) result from dual;
END;

Answer 1

A simple option, which requires just some minor changes to code you already wrote, is a function that returns ref cursor.

CREATE OR REPLACE FUNCTION fNombreProjets(code_Emp IN Employe.idEmploye%type) 
    RETURN sys_refcursor
is
   info_Emp sys_refcursor; 
BEGIN
    OPEN info_Emp for
    SELECT  e.IDEMPLOYE ,
            e.NOMEMPLOYE ,
            e.ADRESSE ,
            e.TELEPHONE ,
            e.ADRESSECOURRIEL
    FROM Employe e
    WHERE idEmploye = code_Emp;

    RETURN info_Emp;
END;    
/

Call it then as

ACCEPT val NUMBER PROMPT 'Entrer le code Employé: '
SELECT fNombreProjets(&val) result FROM dual;

---

[EDIT, to answer question you posted as a comment]

Types first (I'll use Scott's emp sample table for this demo as I don't have your tables):

SQL> CREATE OR REPLACE TYPE t_emp_row AS OBJECT
  2  (
  3     empno NUMBER,
  4     ename VARCHAR2 (10),
  5     job VARCHAR2 (10),
  6     sal NUMBER
  7  );
  8  /

Type created.

SQL> CREATE OR REPLACE TYPE t_emp_tab AS TABLE OF t_emp_row;
  2  /

Type created.

Function:

SQL> CREATE OR REPLACE FUNCTION fNombreProjets (code_emp IN NUMBER)
  2     RETURN t_emp_tab
  3  IS
  4     retval  t_emp_tab;
  5  BEGIN
  6     SELECT t_emp_row (empno,
  7                       ename,
  8                       job,
  9                       sal)
 10       BULK COLLECT INTO retval
 11       FROM emp
 12      WHERE empno = code_emp;
 13
 14     RETURN retval;
 15  END;
 16  /

Function created.

Testing (employee that exists):

SQL> SELECT * FROM TABLE (fNombreProjets (7369));

     EMPNO ENAME      JOB               SAL
---------- ---------- ---------- ----------
      7369 SMITH      CLERK             920

Employee that doesn't exist:

SQL> SELECT * FROM TABLE (fNombreProjets (-7369));

no rows selected

SQL>